# NTSB OAK79FVW06: Bell 47J2A, N8523F, Boulder City, NV, December 31, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 31, 1978
- Place: Boulder City, NV · BOULDER CITY, NV
- Location: 35.9786° N, 114.8325° W: Placed by OpenAirDocs: center of Boulder City, NV, within about 8 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.9786&lon=-114.8325&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 11, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 139105
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK79FVW06
- Page: https://openairdocs.org/ntsb/OAK79FVW06

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3433  78/12/31 NR.BOULDER CITY,NV    BELL 47J2A          CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 40, 2724
        TIME - 1130                    N8523F              PX-  0  0  1  FERRY                     TOTAL HOURS, 527 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         BOULDER CITY,NV              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: VERTICAL
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - WARPED
           MISCELLANEOUS ACTS,CONDITIONS - LOW COMPRESSION
        FACTOR(S)
           TERRAIN - ROUGH/UNEVEN
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- #3 CYL AND #6 CYL.
```

## Aircraft

- Registration: [N8523F](https://openairdocs.org/deregistered/N8523F-2013-05-14), registration cancelled 2013-05-14, S/N 3317, built 1965 (OpenAirDocs)
- Reported make and model: BELL 47J2A
- Registry model: [Bell 47J-2A](https://openairdocs.org/model/bell-47j-2a) (registry code 1181106) (OpenAirDocs)
- Registry engine: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19781231038319A](https://openairdocs.org/incident/19781231038319A), Dec 31, 1978: Bell 47B3, Boulder City, NV, Substantial damage. #3 Cyl and #6 cyl.

## Other investigations on N8523F (2)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB MIA87LA224](https://openairdocs.org/ntsb/MIA87LA224), Aug 7, 1987: Bell 47J-2A (N8523F), Orlando, FL, substantial damage
- [NTSB MKC76DCD54](https://openairdocs.org/ntsb/MKC76DCD54), Jun 27, 1976: Bell 47J-2A (N8523F), Keokuk, IA, substantial damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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